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Dark Cobalt is the second most saturated of the shades of cobalt blue Northstar produces. Dark Cobalt is well suited for thin blown work and cane work. Because of its intensity it must be worked in an oxidizing flame to prevent graying.
Northstar Glassworks borosilicate rods are approximately 20" in length. Sold in 1/4 lb. bundles. 33 COE. Images courtesy of Northstar Glassworks.